[OH:1][C:2]1[C:3]([C:12]([O:14][CH3:15])=[O:13])=[CH:4][C:5]2[C:10]([CH:11]=1)=[CH:9][CH:8]=[CH:7][CH:6]=2.[H-].[Na+].[CH3:18][O:19][CH2:20]Cl.O>C1COCC1>[CH3:18][O:19][CH2:20][O:1][C:2]1[C:3]([C:12]([O:14][CH3:15])=[O:13])=[CH:4][C:5]2[C:10]([CH:11]=1)=[CH:9][CH:8]=[CH:7][CH:6]=2A solution of methyl 3-hydroxy-2-naphthoate (7.01 g) in THF (200 ml) was cooled to 0° C., to which was added 60% sodium hydride (1.58 g) during 10 minutes. Then, the mixture was stirred for one hour at room temperature, to which was added dropwise chloromethyl methyl ether (2.8 ml). The mixture was then stirred for two hours, to which was added water to quench the reaction, followed by extraction with ethyl acetate. The organic layer was dried (anhydrous magnesium sulfate), and distilled off the solvent under reduced pressure. The residue was purified by means of a silica gel column chromatography (eluted with ethyl acetate/hexane) to give methyl 3-methoxymethoxy-2-naphthoate (7.11 g) (Compound B-19). The physical properties are shown in Table 7.
Wird geladen…
